JPH01211645A - Throttle controller of vehicle - Google Patents

Abstract

PURPOSE:To exactly detect an abnormality of circuit from the output of an angle sensor by corresponding the entire operating range of the angle sensor except the opposed sides of the range with the opening and closing range of a throttle operator. CONSTITUTION:The terminal (z) of a brush 48 making sliding action by a thumb throttle lever 40 generates a voltage indicating the amount of turn of the lever 40. The possibly generating range of the angle sensor 42 except the minimum and the maximum area is effective and corresponds to the range from the fully closing position to the fully opening position of the lever 40. The output voltage of the angle sensor 42 is input to an abnormality detecting circuit 50 and when a comparator 52 generates a minimum output voltage and a comparator 54 generates a maximum output voltage, both the circuits generates an H-level signal to light a lamp 60. therefore, it may be found that when the comparator 52 generates the H-level signal, the circuit of the terminal (z) is short-circuited to the earth and when the comparator 54 generates the H-level signal, the circuit of the terminal (z) is short-circuited to a power supply 46. Thus, an abnormality in a circuit may be detected exactly.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a throttle U device for a vehicle in which the amount of rotation of a throttle operator is detected by an angle sensor, and the throttle valve is controlled to rotate by an accumulator. It is something.

(Background of the Invention) In engines such as motorcycles, when the intake negative pressure of the engine becomes excessive, the throttle valve may fail to return (stick) due to frozen sliding parts or wires of the throttle valve, or sand or other biting. ) may occur.

Therefore, it may be possible to detect the amount of rotation of the throttle operator using an angle sensor and rotate the throttle valve using an accumulator such as a servo motor. However, when controlling the throttle valve electrically in this manner, it is desirable to be able to constantly confirm that the circuit is operating normally.

(Purpose of the Invention) The present invention has been made in view of the above circumstances, and is designed to ensure that the throttle operation system operates normally when the amount of rotation of the throttle operator is electrically detected and the throttle valve is driven by the accumulator. The aim is to provide an up-to-date look at Yokoa.

(Structure of the Invention) According to the present invention, the object is to provide a throttle control device for a vehicle that detects the operation amount of a throttle operator with an angle sensor and controls the throttle valve to an opening corresponding to the operation amount using an accumulator. in which a range excluding a certain range on the maximum side and a minimum side among the possible output range of the angle sensor is set as an effective range, and both ends of this effective range correspond to fully closed and fully open positions of the throttle operator, respectively,
This is achieved by a throttle control device for vehicle chaos control, which detects an abnormality because the output of the angle sensor is outside the effective range.

(Embodiment) Figure 1 is an overall conceptual diagram of an embodiment of the present invention, Figures 2 and 3 are
The figure shows a side view and a plan view of a four-wheeled vehicle for traveling on rough terrain to which this embodiment is applied, Fig. 4 shows the abnormality detection circuit, and Fig. 5 shows the relationship between the rotation angle θ of the angle sensor and the output voltage H. FIG.

In Fig. 2.3, reference numeral 10.10 is a steering front wheel with wide ultra-low pressure tires, 12.12 is a driving rear wheel with similar tires, and 14 is an engine mounted near the center of the vehicle body. The output of the engine 14 is transmitted to the rear wheels 12 by a drive shaft 16 shown in FIG. A steering handlebar 18 is provided at the front of the upper part of the vehicle body, and a fuel tank 20 and a straddle-type rotating seat 22 are sequentially arranged behind the steering handlebar 18.

A carburetor 26 is attached to an intake pipe 24 connected to the engine 14. The throttle valve 28 of this carburetor 26
As shown in FIG. 1, the rotation of a servo motor 30 serving as an actuator is transmitted via a reduction gear 32. That is, the throttle valve 28 is opened and closed by the motor 30.

A thumb throttle lever device 34 is attached near the right grip 18a of the handlebar 18. As shown in FIG. 1, this device 34 includes a case 36 fixed to the handlebar 18 side, a support shaft 38 projecting downward from the case 36, and a thumb throttle lever attached to the lower end of the support shaft 38. 40, and an angle sensor 42 housed in the case 36 and rotated by the thumb throttle lever 40 to detect the amount of rotation of the thumb throttle lever 40. The thumb throttle lever 40 and the angle sensor 42 are provided with a return behavior in which the return direction of the lever 40, that is, the rotation end of the lever 40 is directed rearward by a spring (not shown).

This angle sensor 42 is composed of a potentiometer as shown in FIG. That is, one end χ of the resistor 44 is grounded, while the other end y is connected to the voltage V terminal of the power supply 46 . Terminal Z of the brush 48 that slides when the thumb throttle lever is <-40 outputs a voltage that indicates the amount of rotation θ of the lever 40. The output of this angle sensor 42 is the lever 4.
The amount of rotation θ of 0 is determined as shown in FIG. In other words, of the possible output range of the angle sensor 42, H2 to H3 is the effective range, excluding the minimum O(=H1) to H2 and the maximum H3 to H4. And this range H2~
The lever 3 and the lever 2 are set to the fully closed position θ1 of the lever 40, and the lever 3 is set to the fully open position θ2 of the lever 40, respectively. In other words, of the entire resistance range γ=0 to R of the angle sensor 42, only the intermediate range γ=a to b is used. In this case, of the entire movable range of the lever 40, only the range 01 to θ2 may be set to be linked to the range H2 to H3 of the angle sensor 42.

The output of this angle sensor 42 is input to an abnormality detection circuit 50. This abnormality detection circuit 50 has two
Comparators 52 and 54, setters 56 and 58, an OR circuit 59, and a warning lamp 60 are provided. Setting device 56.5
8 sets the voltages HI2 and HI3 shown in FIG. At this time, the lamp 60 is lit by outputting an H level output. That is, if the output is in the range of HIGH 2 to HIGH 3, it is normal, and if it is out of this range, it is assumed that there is an abnormality and the lamp 60 is turned on. For example, if the comparator 52 outputs an H level when the output is high θ to hi1, it is assumed that the yarn path of terminal Z is shorted to the ground side, and if the output is high 2 to hi3, the yarn path of terminal Z is It can be seen that there is a short circuit with the electric @i46 side. In this way, by separately determining the outputs of the comparators 52 and 54, it is possible to determine an abnormal path.

This embodiment illustrates an abnormality detection circuit for only the yarn path of terminal Z, but the voltage of terminals χ, y or each terminal χ, y,
Abnormality can be detected from the voltage between z. Different displays may be displayed depending on the mode of each abnormality. For example, if terminal χ is at a voltage other than the ground voltage, it can be determined that there is a short circuit in the yarn path of χ, and if terminal y is at a voltage other than the specified voltage, it can be determined that there is an abnormality in the yarn path of y.

The output of this angle sensor 42 is the thumb throttle lever 4.
The amount of rotation θ is 0. This output signal is input to the control device 62. The control device 62 is composed of a CPU, an input/output interface, etc., and performs a predetermined operation according to an operation program stored in a ROM, determines the opening degree θ of the throttle valve 28 based on the output value, and determines the opening degree e and the opening degree of the snake. The motor 30 is driven so that.

(Effects of the Invention) As described above, the present invention makes the range excluding both ends of the entire range of the angle sensor that detects the operation amount of the throttle operator correspond to the opening/closing range of the throttle operator, and from the output of the angle sensor. Since circuit abnormalities are detected, circuit abnormalities can be reliably detected.

[Brief explanation of the drawing]

Figure 1 is an overall conceptual diagram of an embodiment of the present invention, Figures 2 and 3 are
The figure shows a side view and a plan view of a four-wheeled vehicle for traveling on rough terrain to which this embodiment is applied, Fig. 4 shows the abnormality detection circuit, and Fig. 5 shows the relationship between the rotation amount e of the angle sensor and the output voltage h. FIG. 40... Throttle operator, 42... Angle sensor, 50... Abnormality detection circuit. Patent applicant Yamaha Motor Co., Ltd.

Claims (1)

[Scope of Claims] A throttle control device for a vehicle that detects the operation amount of a throttle operator with an angle sensor and controls a throttle valve to an opening corresponding to this operation amount using an accumulator, comprising: A range excluding certain ranges on the maximum side and minimum side of the output range is set as an effective range, and both ends of this effective range correspond to the fully closed and fully open positions of the throttle operator, respectively, and the output of the angle sensor is set as the effective range. A vehicle throttle control device characterized by detecting an abnormality based on being out of range.